Nice try, those ladybugs look cute! However, i'll quote this from savage garden book by Peter D'Amato "we released ten thousand ladybugs to see what would happen. What happened was we found ou that ladybugs make an excellent food for carnivorous plants, as all were eaten in about two days. Ladybugs were so drunk on the nectar of pitcher plants, we watched them stepping over aphids as they followed the nectar trails to their death."
Of course, Peter D'Amato had a HUGE greenhouse, so you can't really compare. What I'm trying to say is that the ladybug method might not work if you have 7 or 8 neps. They will get eaten faster than killing aphids.
Good luck with solving your problem!
